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pensil = y
2(3y) + 5y = 5.500
6y + 5y = 5.500
11y = 5.500
y = 5.500 : 11
y = 500
1 pensil = y = 500
Misalkan harga sebuah pensil = p.
b = 3p
2b + 5p = 5.500
2b + 5p = 5.500
2(3p) + 5p = 5.500
6p + 5p = 5.500
11p = 5.500
p = 500
Jadi harga satu pensil adalah Rp 500,00.